Question

我在主窗口内有一个框架，里面有一个包含面板和各种内容的页面。主窗口决定加载页面，然后必须与其内容进行交互（这是问题所在）。

我尝试了很多解决方案，最好的是这个，但将pageLogin作为空对象返回

    _mainFrame.Source = new Uri(@"/Pages/Login.xaml", UriKind.Relative);
    Page pageLogin = this._mainFrame.Content as Page;

其中_mainFrame当然是t mainwindow中框架的名称，而Login.xaml是里面有Login_panel Stackpanel的内容

Answer 1

行。首先，我认为你可能会采取错误的方式开始。看看这个项目。 http://www.wpfsharp.com/2011/04/05/navigation-and-pages-using-model-view-viewmodel-mvvm/

试试这个例子：

MainWindow.xaml

<Window x:Class="Test.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        Loaded="Window_Loaded"
        >
    <Grid>
        <Frame Name="MainFrame" Source="/Login.xaml"></Frame>
    </Grid>
</Window>

MainWindow.xaml.cs

using System;
using System.Windows;
using System.Windows.Controls;

namespace Test
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            var a = MainFrame.Content as Page;
            var grid = a.Content as Grid;
            var textBlock = grid.Children[0];
            // bla bla, you logged in
            MainFrame.Source = new Uri("/Home.xaml", UriKind.Relative);
            var b = MainFrame.Content as Page; // Still Login.xaml
            MainFrame.ContentRendered +=MainFrame_ContentRendered;
        }

        private void MainFrame_ContentRendered(object sender, EventArgs e)
        {
            var b = MainFrame.Content as Page; // Is now Home.xaml
        }
    }
}

Login.xaml

<Page x:Class="Test.Login"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      mc:Ignorable="d" 
      d:DesignHeight="300" d:DesignWidth="300"
    Title="Login">

    <Grid>
        <TextBlock>This is a sample login page.</TextBlock>
    </Grid>
</Page>

如何在框架内访问页面内容？

1 个答案: